Also at the bash: The X Factor judge‘s fiancé Jason Trawick; her father Jamie; brother Bryan and his wife Graciella; and adorable young British music enthusiasts – and frequent guests of The Ellen DeGeneres Show – Sophia Grace and Rosie, whom Spears met on the talk show recently.

Preston and Jayden’s friends enjoyed pizza, ice cream and a Call of Duty-inspired cake. The birthday boys also opened a few gifts including Spider-Man gear and Nerf blasters.